Exchange can't stop scammers, biggest scammers in the world are exchanges. wait until bitcoin hits $1,000,000 and they will run off with your coins and claim they got hacked. Please say that shit to someone who didn't get 100 bitcoins stolen from mtgox.
ETH and Exchanges were the worst that happened to crypto.
Can't give any other feedback because you have made the above argument. Good luck! I just want to emphasize that you need the most effective way to help customers out of scammers.